Surface pattern for vehicle seat backrest



FIG. 1 is a front perspective view of a surface pattern for vehicle seat backrest showing our new design, it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design; and,

FIG. 2 is an enlarged fragmentary front elevational view of the backrest portion thereof. 

The ornamental design for a surface pattern for vehicle seat backrest, as shown and described. 